package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorsMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Collections;
import java.util.List;
@Service
public class DishServiceImpl implements DishService {
        @Autowired
        private DishMapper dishMapper;
        @Autowired
        private DishFlavorsMapper dishFlavorsMapper;
        @Autowired
        private SetmealDishMapper setmealDishMapper;
        @Transactional
        public void saveWithFlavor(DishDTO dishDTO) {
            Dish dish=new Dish();
            BeanUtils.copyProperties(dishDTO,dish);
            dishMapper.insert(dish);
            //主键回显
            Long dishId = dish.getId();

            List<DishFlavor> flavors = dishDTO.getFlavors();
            if (flavors!=null&&flavors.size()>0){
                flavors.forEach(dishFlavor -> {
                    dishFlavor.setDishId(dishId);
                });
                dishFlavorsMapper.insertBatch(flavors);
            }
        }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
         PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

            //page的类型是要返回的类型，...VO是返回类的pojo
         Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(), page.getResult());
    }

    @Transactional
    public void deleteBatch(List<Long> ids) {
            //在售商品不能删除
            for (Long id:ids){
                Dish dish=dishMapper.getById(id);
                if (dish.getStatus()== StatusConstant.ENABLE){
                    throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
                }
            }
            //菜品被套餐关联不能删除
        List<Long> setMealIds = setmealDishMapper.getSetMealIdsByDishIds(ids);
            if (setMealIds !=null&&setMealIds.size()>0){
                //关联了套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
            }

       /* for(Long id:ids){
            //删除菜品表中的菜品数据
            dishMapper.deleteById(id);
            //删除口味表中的数据
            dishFlavorsMapper.deleteByDishId(id);
        }*/

        //根据菜品id集合批量删除菜品数据
        dishMapper.deleteByIds(ids);

        dishFlavorsMapper.deleteByDishIds(ids);
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors=dishFlavorsMapper.getByDishId(id);

        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
      Dish dish=new Dish();
      BeanUtils.copyProperties(dishDTO,dish);
      //修改基本信息
      dishMapper.update(dish);
        //删除原来的口味数据
        dishFlavorsMapper.deleteByDishIds(Collections.singletonList(dishDTO.getId()));
    //重新插入口味数据
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if (flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorsMapper.insertBatch(flavors);
        }
        }
}
